S-93516A544 1/4"-20 x 1 1/4" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for long-lasting performance in harsh marine and industrial environments
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and structural integrity
• Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
• UNC coarse thread with Class 2A fit enables faster installation and secure fastening in various materials
• External hex drive design allows for easy tightening with standard tools and high torque application
• Full threading along the 1-1/4" length offers maximum grip and adjustment flexibility
• Compliance with major industry standards including ASME B18.2.1, ensuring quality and reliability

Professional Applications & Engineering Value

This 651 Silicon Bronze hex head screw is specifically engineered to address the critical challenges of corrosion-prone environments where standard fasteners fail prematurely. The silicon bronze composition provides exceptional resistance to saltwater corrosion, making it ideal for marine applications, coastal structures, and chemical processing facilities. The UNC coarse thread pattern with Class 2A fit ensures reliable engagement in both soft and hard materials, while the external hex drive accommodates high torque applications without stripping. With its 70,000 psi tensile strength and Rockwell B70 hardness, this heavy-duty fastener maintains structural integrity under significant stress, solving durability concerns in demanding industrial settings where vibration and environmental factors compromise fastener performance.

Specification Summary & Compliance

This 1/4"-20 x 1-1/4" hex head screw features precise Class 2A thread fit tolerances and UNC coarse threading manufactured to ASME B18.2.1 specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications. The inch system measurements, including the 7/16" head width and 5/32" head height, maintain consistent dimensional accuracy for reliable performance in assembly operations.